The investigations were carried out on Ti-Ni and Ni-Fe alloys. The control of alloys is based on the temperatural and kinetic dependencies of electrical conductivity and on the investigations of substructure by transmission electron microscopy method and X- rays analysis with determining its quantitative characteristic.

Ni-Fe alloys has stoichiometric composition A₃B and order- disorder phase transformation. These alloys have been investigated with long and short range order state. The authors of these investigations succeeded in receiving of the interesting experimental results about microscopic structure evolution after plastic deformation. These results make it possible to describe the electrical conductivity curves after irradiation and heating of the specimens. The alloys have various deformed dislocational substructures. These investigations enable to study the substructural stability, the recovery and the character of electrical conductivity change after thermal treatment. The kinetic recovery comparison and electrical conductivity change determine the contribution of the linear and the surface defects in electrical resistance. It has been found, that stages of recovery connect with changing of electrical resistance. It has been received, that condition of order influences on character and degree changing of electrical conductivity after irradiation. The irradiation influences on disorder alloy more than an order one. Besides, it influences on degree long range order and leads to unperiodical oscillation electrical resistance after some time.

The titanium-nickel alloys have unique features such as shape memory, superplastic, etc. The temperature intervals of these features are determined by temperature fields of martensite transformation B2-B19' and B2-R-B19' and pre-martensite phenomena. The temperature dependencies of curves electrical resistance in investigated alloys make possible to get the characteristic temperature of martensite transformation. The complex of interesting features in these alloys determines by mutual arrangement of temperature of the beginning and of the end of martensite transformation (M_S, M_f, A_S, A_f, T_R), and by sensitivity to phase strain, etc. Different preliminary thermal treatments display on the curves of electrical conductivity. So application of electrical conductivity method makes possible to determine quickly the thermal treatment influence on the changing of these parameters and, consequently, on the features of shape memory.

The objective establishments between electrical conductivity and microscopic structure of alloys after phase transformation, irradiation, deformation and heating enable to raise precision of control evaluation assurance of materials after thermal treatment.